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Title:
SECRET CALCULATING DEVICE, SECRET CALCULATING METHOD, PROGRAM, AND RECORDING MEDIUM
Document Type and Number:
WIPO Patent Application WO/2019/176520
Kind Code:
A1
Abstract:
This secret calculating device uses secret shared values {xi}of xi (i = 0, 1, 2) to calculate secret shared values {si} = {xi} - 1/2; by means of secret calculating using the secret shared values {si}, calculates and outputs secret shared values {y} = {4S0S1S2} + 1/2; and, by means of secret calculating using a secret shared value {r} of a random number r and the secret shared values {si}, calculates and outputs secret shared values {yr} = {4rs0s1s2} + {r}/2.

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Inventors:
IKARASHI DAI (JP)
Application Number:
PCT/JP2019/007172
Publication Date:
September 19, 2019
Filing Date:
February 26, 2019
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Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
G09C1/00
Domestic Patent References:
WO2016042693A12016-03-24
WO2012121333A12012-09-13
WO2014112548A12014-07-24
Foreign References:
JP2011199821A2011-10-06
JP2006301310A2006-11-02
JP2016173533A2016-09-29
JP2016173532A2016-09-29
JP2016173531A2016-09-29
JP2016156853A2016-09-01
Other References:
See also references of EP 3767608A4
KOJI CHIDAKOKI HAMADADAI IKARASHIKATSUMI TAKAHASHI: "A Three-Party Secure Function Evaluation with Lightweight Verifiability Revisited", CSS, 2010
RONALD CRAMERIVAN DAMGARDYUVAL ISHAI: "Share conversion, pseudorandom secret-sharing and applications to secure distributed computing", THEORY OF CRYPTOGRAPHY, 2005, pages 342 - 362
Attorney, Agent or Firm:
NAKAO, Naoki et al. (JP)
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